Google2FA for Laravel

Google Two-Factor Authentication for PHP Package for Laravel

Google2FA is a PHP implementation of the Google Two-Factor Authentication Module, supporting the HMAC-Based One-time Password (HOTP) algorithm specified in RFC 4226 and the Time-based One-time Password (TOTP) algorithm specified in RFC 6238.

This package is a Laravel bridge to Google2FA's PHP package.

Demos, Example & Playground

Please check the Google2FA Package Playground.

Here's an demo app showing how to use Google2FA: google2fa-example.

You can scan the QR code on this (old) demo page with a Google Authenticator app and view the code changing (almost) in real time.

Requirements

• PHP 5.4+

Compatibility

This package is compatible with

• Laravel 4.1+
• Laravel 5+

Installing

Use Composer to install it:

composer require pragmarx/google2fa-laravel

If you prefer inline QRCodes instead of a Google generated url, you'll need to install BaconQrCode:

composer require "bacon/bacon-qr-code":"~1.0"

Installing on Laravel

Laravel 5.5

You don't have to do anything else, this package autoloads the Service Provider and create the Alias, using the new Auto-Discovery feature.

Laravel 5.4 and below

Add the Service Provider and Facade alias to your app/config/app.php (Laravel 4.x) or config/app.php (Laravel 5.x):

PragmaRX\Google2FALaravel\ServiceProvider::class,

'Google2FA' => PragmaRX\Google2FALaravel\Facade::class,

Publish the config file

php artisan vendor:publish --provider=PragmaRX\\Google2FALaravel\\ServiceProvider

Using It

Use the Facade

use Google2FA;

return Google2FA::generateSecretKey();

In Laravel you can use the IoC Container

$google2fa = app('pragmarx.google2fa');

return $google2fa->generateSecretKey();

Middleware

This package has a middleware which will help you code 2FA on your app. To use it, you just have to:

Demo

Click here to see the middleware demo:

Using the middleware

Add the middleware to your Kernel.php:

protected $routeMiddleware = [
    ...
    '2fa' => \PragmaRX\Google2FALaravel\Middleware::class,
];

Using it in one or more routes:

Route::get('/admin', function () {
    return view('admin.index');
})->middleware(['auth', '2fa']);

Configuring the view

You can set your 'ask for a one time password' view in the config file (config/google2fa.php):

/**
 * One Time Password View
 */
'view' => 'google2fa.index',

And in the view you just have to provide a form containing the input, which is also configurable:

/**
 * One Time Password request input name
 */
'otp_input' => 'one_time_password',

Here's a form example:

    <form action="/google2fa/authenticate" method="POST">
        <input name="one_time_password" type="text">

        <button type="submit">Authenticate</button>
    </form>

One Time Password Lifetime

Usually an OTP lasts forever, until the user logs off your app, but, to improve application safety, you may want to re-ask, only for the Google OTP, from time to time. So you can set a number of minutes here:

/**
* Lifetime in minutes.
* In case you need your users to be asked for a new one time passwords from time to time.
*/

'lifetime' => 0, // 0 = eternal

And you can decider whether your OTP will be kept alive while your users are browsing the site or not:

/**
 * Renew lifetime at every new request.
 */

'keep_alive' => true,

Manually logging out from 2Fa

This command wil logout your user and redirect he/she to the 2FA form on the next request:

Google2FA::logout();

If you don't want to use the Facade, you may:

use PragmaRX\Google2FALaravel\Support\Authenticator;

(new Authenticator(request()))->logout();

Documentation

Check the ReadMe file in the main Google2FA repository.

Tests

The package tests were written with phpspec.

Author

Antonio Carlos Ribeiro

License

Google2FA is licensed under the BSD 3-Clause License - see the LICENSE file for details

Contributing

Pull requests and issues are more than welcome.